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44 lines
890 B
C++
44 lines
890 B
C++
/*++
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Copyright (c) 2011 Microsoft Corporation
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Module Name:
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cancel_eh.h
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Abstract:
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Template for implementing simple event handler that just invokes cancel method.
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Author:
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Leonardo de Moura (leonardo) 2011-04-27.
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Revision History:
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--*/
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#ifndef CANCEL_EH_H_
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#define CANCEL_EH_H_
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#include "util/event_handler.h"
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/**
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\brief Generic event handler for invoking cancel method.
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*/
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template<typename T>
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class cancel_eh : public event_handler {
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bool m_canceled;
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T & m_obj;
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public:
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cancel_eh(T & o): m_canceled(false), m_obj(o) {}
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~cancel_eh() override { if (m_canceled) m_obj.dec_cancel(); }
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void operator()(event_handler_caller_t caller_id) override {
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if (!m_canceled) {
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m_caller_id = caller_id;
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m_canceled = true;
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m_obj.inc_cancel();
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}
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}
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bool canceled() const { return m_canceled; }
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};
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#endif
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